(4R,5R,8R)-4-Methanesulfonyloxy-8-((3bS,6R,8aS,8bS,10aR)-10-methoxy-3a,5a-dimethyl-hexadecahydro-cyclopenta[a]cyclopropa[2,3]cyclopenta[1,2-f]naphthalen-6-yl)-5-methyl-nonanoic acid isopropyl ester 在
potassium tert-butylate 作用下,
以
四氢呋喃 、
苯 为溶剂,
生成 {(1S,2S)-2-[(1R,4R)-4-((3bS,6R,8aS,8bS,10aR)-10-Methoxy-3a,5a-dimethyl-hexadecahydro-cyclopenta[a]cyclopropa[2,3]cyclopenta[1,2-f]naphthalen-6-yl)-1-methyl-pentyl]-cyclopropyl}-acetic acid isopropyl ester